From all six world heritage sites near Madrid, Avila is my favorite site better than Toledo or Segovia in my opinion. Situated on high hills northwest of Madrid, Avila is well known for its cool climate and the holy story of Santa Teresa. Santa Teresa did not make Avila to be a pilgrimage place, that put this town on traveler's map, liked Santiago de Compostela, but its city wall is the reason that put Avila on the top list of every tourist’s mind. Avila’s medieval wall is considered as one of the best-preserved city walls in Europe, and maybe one of the most beautiful I have ever seen.
Walking around the old town to see the wall is just great activity for me especially on the eastern side. The wall is really picturesque and contains some element of mystery of medieval age that made this place so charming. I do not recommend you walk on the wall as the feelings are so different and I personally preferred to walk on the ground which I think this way is better to make you appreciate this place. I have to say I really enjoyed the wall and seem to ignore another part of world heritage – the extramuros churches. But if you come to Avila, your eyes will directly gaze to the wall not the churches which are just next to the wall liked me. However, the churches are really nice and deservedly to get your time.
Avila is really well connected by train with Madrid and can be combining with the trip to Salamanca. When you are in Avila don’t forget to try its special delicacy – Yemas de Santa Teresa (a sweet made with egg yolks and sugar) a really great plus for the visiting.